[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

grits/coarsegrain.py

@@ -745,7 +745,9 @@ def save(self, cg_gsdfile, start=0, stop=None, stride=1):
 
                     # do the force calculation here
                     # do the velocity calculation here
-                    velocity += [np.mean(s.particles.velocity[x], axis=0) for x in inds]
+                    velocity += [
+                        np.mean(s.particles.velocity[x], axis=0) for x in inds
+                    ]
 
                     if self.aniso_beads:
                         for x in inds: